Datalogged and need interpretation

Hello everyone! I sent this as an email to Vishnu on Sunday and am patiently awaiting a reply by their guys. Hopefully it will be sometime this week. They have not let me down before and i hope they dont start now.

I had been running the 9-10 Aggresive 93 octane map for a long time, and it had performed fairly well. Occasionally rough idle/jerky. It started acting up about a month ago, and since the weather is getting so much hotter, i decided to go easy on the car and just use the stock map. Ive used that for about a month now, and i find that it is too slow, so today i decided to try the 7-29 Autotuning maps. I reset the Procede, then loaded up the 7-29 DIC 6MT map for the Stock Turbo.

The car has been running fantastic, smooth and pulls harder than the stock tune i was running for a while. But one thing i noticed is that im getting a 'farty/bassy/boomy' sound when im about 75%+ throttle in high RPMs (like 4k-7k). At WOT it either performs well, or i cant hear the farty sound as much because everything else is louder. The farty/bassy sound reminds me of when it started misfiring before i replaced the spark plugs .Before i would get this farty sound, then a jerk, and a CEL. That was solved by the new plugs.

Am i losing another coilpack? Plugs? If so, how can i single out which one(s) if the car isnt actually misfiring yet? Is it something else entirely? I attached a datalog to help the cause. It started out from a standstill and i got on it in 2nd and kept it till the end of 3rd.

Thanks for the support,

Eric

And here is a photo of some of the data:

I am having trouble attaching the CSV file to this thread, so sent me a PM with your email if you want to check it out. The channels that im displaying go in this order:

At around the 16 second mark the AFRs are at a steady 11.2 - 11.6 (this is third gear). Same thing at the 12 second mark in second gear. The boost is flat-lining at around 13 psi at WOT.

Appreciate all the info i can get! The sound truly is 'farty' or 'bassy' blasting sound when under heavy load. I texted @E90SoFlo and he thought it might be a coilpack going out. Let me know what you think! Id be more than happy to upload anything else you need to help me figure it out! I know @Terry@BMS will know how to interpret this easily even though it isnt his job to do so. Thats what makes him amazing

Too busy this week to look at the logs but that sound in general often means you're running lean. Maybe maxing out part throttle fuel trims, etc. So check those and the AFR when the sound comes up to see if there is a correlation. If there is increase open loop mapping in that area or reduce boost targets.

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I have no idea. Not as familiar as i would like to be.... All i know is shoot for 12 AFR at WOT and what the boost taper should be

Originally Posted by Terry@BMS

Too busy this week to look at the logs but that sound in general often means you're running lean. Maybe maxing out part throttle fuel trims, etc. So check those and the AFR when the sound comes up to see if there is a correlation. If there is increase open loop mapping in that area or reduce boost targets.

Your the best Terry. Thanks for the time and opinion. +rep

Since im averaging 11.2-11.6 AFR at WOT, would this show that your opinion is correct? I have autotuning ON by the way, so not sure how much of a difference that would make...

Debug Byte 4 is the HPFP voltage output (from Procede to DME) signal. The lower you make it, the more the DME will compensate (increase injector pulse-width) for what it believes to be low fuel pressure condition. The catch is, if you reduce this signal too much (say below 1.5v), a fuel pressure code will be triggered

If it's near 1.5, which is probably the case, you have no more room. You'll need to get a base flash for fueling

adjust open loop fueling to 100% 34.1 fuel trims mean maxed. I don't remember if AT maps have the scalar. If not go directly into your open loop fuel map and raise everything that's higher than 7 by 1. You can control + arrow keys then pgup and pgdown to control a grouping. Differences in Waste gate position will change the noise. Try 20% 50% 75% 90% here for wastegate rattle.

I hate PROcede logs, but strictly looking at the 10-13 second range on the logs the Fuel Trims are maxed out, but luckily your AFR looks like it's still good. Chances are if you every hear from Vishnu, they'll tell you A) something is wrong with your car or B) buy the PROcede Rev3 and everything will work 100%

I have nearly identical logs to the OPs. I can also feel that something is not exactly right when I'm WOT in the top 3 gears. I am running meth as well though. If i'm running hard and start in 2nd and go all the way to the top of 5th its fine, if i'm on the highway and drop to 4th or 5th and go wot I can feel that the engine is just a bit rough. I think its time to make some small specific changes to a table just don't know where to start or how to do it safely.

Originally Posted by themyst

OP if you're maxing fuel trims, you need to lean out your AFR bias a bit (11's is a bit too rich) and raise open loop (fuel pressure). Easy fix, just not user friendly.

@Eric2335 OL Fueling is under User Adjustable. It seems that 95% is the sweet spot for most people, and what is suggested the most.

I have nearly identical logs to the OPs. I can also feel that something is not exactly right when I'm WOT in the top 3 gears. I am running meth as well though. If i'm running hard and start in 2nd and go all the way to the top of 5th its fine, if i'm on the highway and drop to 4th or 5th and go wot I can feel that the engine is just a bit rough. I think its time to make some small specific changes to a table just don't know where to start or how to do it safely.

@Eric2335 OL Fueling is under User Adjustable. It seems that 95% is the sweet spot for most people, and what is suggested the most.